GreyFlow™ Class C Trafficable Access Cover (600mm)
600mm round Class C trafficable access cover for GreyFlow™ underground pump stations and compatible pump pits.
Use case: For locations requiring a higher load rating (e.g., driveways / light-vehicle areas), when installed correctly with an appropriate surround/support detail.
Important: Traffic loading depends on the cover class + civil installation detail (support ring/collar, surround, and finished surface build-up). Confirm final suitability and installation detail with the project designer/engineer.
AS 3996 reference (specifier note): Class C is commonly shown as a medium-duty traffic class with ULS design load = 150 kN in AS 3996 class tables.
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This content has been reviewed and approved by Dylan Timney, Managing Director of WCTNZ®, who brings over 17 years of composting toilet expertise and 16 years of experience in building and eco-construction in New Zealand.
Last reviewed: June 26, 2025